package junit.samples.money;

import junit.framework.*;

public class MoneyTest extends TestCase {

  private Money f12CHF;
  private Money f14CHF;
  private Money f7USD;
  private Money f21USD;

  private IMoney fMB1;
  private IMoney fMB2;

  public static void main(String args[]) {
    junit.textui.TestRunner.run(MoneyTest.class);
  }

  protected void setUp() {
    f12CHF = new Money(12, "CHF");
    f14CHF = new Money(14, "CHF");
    f7USD = new Money(7, "USD");
    f21USD = new Money(21, "USD");

    fMB1 = MoneyBag.create(f12CHF, f7USD);
    fMB2 = MoneyBag.create(f14CHF, f21USD);
  }

  public void testBagMultiply() {
    // {[12 CHF][7 USD]} *2 == {[24 CHF][14 USD]}
    IMoney expected = MoneyBag.create(new Money(24, "CHF"), new Money(14, "USD"));
    assertEquals(expected, fMB1.multiply(2));
    assertEquals(fMB1, fMB1.multiply(1));
    assertTrue(fMB1.multiply(0).isZero());
  }

  public void testBagNegate() {
    // {[12 CHF][7 USD]} negate == {[-12 CHF][-7 USD]}
    IMoney expected = MoneyBag.create(new Money(-12, "CHF"), new Money(-7, "USD"));
    assertEquals(expected, fMB1.negate());
  }

  public void testBagSimpleAdd() {
    // {[12 CHF][7 USD]} + [14 CHF] == {[26 CHF][7 USD]}
    IMoney expected = MoneyBag.create(new Money(26, "CHF"), new Money(7, "USD"));
    assertEquals(expected, fMB1.add(f14CHF));
  }

  public void testBagSubtract() {
    // {[12 CHF][7 USD]} - {[14 CHF][21 USD] == {[-2 CHF][-14 USD]}
    IMoney expected = MoneyBag.create(new Money(-2, "CHF"), new Money(-14, "USD"));
    assertEquals(expected, fMB1.subtract(fMB2));
  }

  public void testBagSumAdd() {
    // {[12 CHF][7 USD]} + {[14 CHF][21 USD]} == {[26 CHF][28 USD]}
    IMoney expected = MoneyBag.create(new Money(26, "CHF"), new Money(28, "USD"));
    assertEquals(expected, fMB1.add(fMB2));
  }

  public void testIsZero() {
    assertTrue(fMB1.subtract(fMB1).isZero());
    assertTrue(MoneyBag.create(new Money(0, "CHF"), new Money(0, "USD")).isZero());
  }

  public void testMixedSimpleAdd() {
    // [12 CHF] + [7 USD] == {[12 CHF][7 USD]}
    IMoney expected = MoneyBag.create(f12CHF, f7USD);
    assertEquals(expected, f12CHF.add(f7USD));
  }

  public void testBagNotEquals() {
    IMoney bag = MoneyBag.create(f12CHF, f7USD);
    assertFalse(bag.equals(new Money(12, "DEM").add(f7USD)));
  }

  public void testMoneyBagEquals() {
    assertTrue(!fMB1.equals(null));

    assertEquals(fMB1, fMB1);
    IMoney equal = MoneyBag.create(new Money(12, "CHF"), new Money(7, "USD"));
    assertTrue(fMB1.equals(equal));
    assertTrue(!fMB1.equals(f12CHF));
    assertTrue(!f12CHF.equals(fMB1));
    assertTrue(!fMB1.equals(fMB2));
  }

  public void testMoneyBagHash() {
    IMoney equal = MoneyBag.create(new Money(12, "CHF"), new Money(7, "USD"));
    assertEquals(fMB1.hashCode(), equal.hashCode());
  }

  public void testMoneyEquals() {
    assertTrue(!f12CHF.equals(null));
    Money equalMoney = new Money(12, "CHF");
    assertEquals(f12CHF, f12CHF);
    assertEquals(f12CHF, equalMoney);
    assertEquals(f12CHF.hashCode(), equalMoney.hashCode());
    assertTrue(!f12CHF.equals(f14CHF));
  }

  public void testMoneyHash() {
    assertTrue(!f12CHF.equals(null));
    Money equal = new Money(12, "CHF");
    assertEquals(f12CHF.hashCode(), equal.hashCode());
  }

  public void testSimplify() {
    IMoney money = MoneyBag.create(new Money(26, "CHF"), new Money(28, "CHF"));
    assertEquals(new Money(54, "CHF"), money);
  }

  public void testNormalize2() {
    // {[12 CHF][7 USD]} - [12 CHF] == [7 USD]
    Money expected = new Money(7, "USD");
    assertEquals(expected, fMB1.subtract(f12CHF));
  }

  public void testNormalize3() {
    // {[12 CHF][7 USD]} - {[12 CHF][3 USD]} == [4 USD]
    IMoney ms1 = MoneyBag.create(new Money(12, "CHF"), new Money(3, "USD"));
    Money expected = new Money(4, "USD");
    assertEquals(expected, fMB1.subtract(ms1));
  }

  public void testNormalize4() {
    // [12 CHF] - {[12 CHF][3 USD]} == [-3 USD]
    IMoney ms1 = MoneyBag.create(new Money(12, "CHF"), new Money(3, "USD"));
    Money expected = new Money(-3, "USD");
    assertEquals(expected, f12CHF.subtract(ms1));
  }

  public void testPrint() {
    assertEquals("[12 CHF]", f12CHF.toString());
  }

  public void testSimpleAdd() {
    // [12 CHF] + [14 CHF] == [26 CHF]
    Money expected = new Money(26, "CHF");
    assertEquals(expected, f12CHF.add(f14CHF));
  }

  public void testSimpleBagAdd() {
    // [14 CHF] + {[12 CHF][7 USD]} == {[26 CHF][7 USD]}
    IMoney expected = MoneyBag.create(new Money(26, "CHF"), new Money(7, "USD"));
    assertEquals(expected, f14CHF.add(fMB1));
  }

  public void testSimpleMultiply() {
    // [14 CHF] *2 == [28 CHF]
    Money expected = new Money(28, "CHF");
    assertEquals(expected, f14CHF.multiply(2));
  }

  public void testSimpleNegate() {
    // [14 CHF] negate == [-14 CHF]
    Money expected = new Money(-14, "CHF");
    assertEquals(expected, f14CHF.negate());
  }

  public void testSimpleSubtract() {
    // [14 CHF] - [12 CHF] == [2 CHF]
    Money expected = new Money(2, "CHF");
    assertEquals(expected, f14CHF.subtract(f12CHF));
  }
}